WWYD...DD's birthday

DD's birthday is in about a week or so. I sent invites out on the last day of school. She is turning 7 so invited 7 friends. Two of the girls I don't know if they got their invites, they weren't at the last day of school. I don't know their mothers and they aren't on facebook.

What would u do? Invite two more friends and hope the other two don't RSVP at the last minute or leave it?

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